CN111089324B - Heating system and control method thereof - Google Patents
Heating system and control method thereof Download PDFInfo
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- CN111089324B CN111089324B CN201911285952.1A CN201911285952A CN111089324B CN 111089324 B CN111089324 B CN 111089324B CN 201911285952 A CN201911285952 A CN 201911285952A CN 111089324 B CN111089324 B CN 111089324B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 250
- 238000005338 heat storage Methods 0.000 claims abstract description 103
- 230000008020 evaporation Effects 0.000 claims abstract description 12
- 238000001704 evaporation Methods 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 description 23
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
- F24H4/04—Storage heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a heating system and a control method thereof, wherein the heating system comprises an air source heat pump, a heat storage water tank, a water source heat pump and a heat supply tail end which are sequentially connected; the air source heat pump and the heat storage water tank form a first circulation loop through an air source heat pump circulating pump; the heat storage water tank and the water source heat pump form a second circulation loop through a circulation pump at the evaporation side of the water source heat pump; and the water source heat pump and the heat supply tail end form a third circulation loop through a heat supply tail end circulating pump. The heating system effectively combines the air source heat pump and the water source heat pump, and realizes heat output of high water temperature at the tail end of heat supply under the condition of low environment. Meet the requirement of high water temperature in the market and simultaneously produce the phase-contrast CO2The system technology has low manufacturing cost.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a heating system and a control method of the heating system.
Background
An air source heat pump is also called as an air energy water heater and also called as an air source heat pump water heater; low-temperature heat in air is absorbed, the fluorine medium is gasified, the fluorine medium is compressed by a compressor and then pressurized and heated, the fluorine medium is converted by a heat exchanger to supply water for heating, and the water temperature is heated by the compressed high-temperature heat energy. The air source heat pump has the characteristics of high efficiency, energy conservation and high utilization efficiency, and the use amount of the air source heat pump is increased along with the coming of the policy related to 'clean heating' in northern areas of China.
However, due to the influence of refrigerant characteristics, technical level, manufacturing cost and the like, the temperature of the outlet water of the air source heat pump cannot be too high, and the highest temperature is usually only about 60 ℃, so that the requirement of high water temperature in the market is difficult to meet.
Refrigerants of the conventional air-source heat pump at present comprise R22, R32, R410a, R134a and R744(CO2) refrigerants; under the influence of the refrigerant characteristics, R22, R32 and R410a refrigerants can adapt to low ring temperature (-20 ℃), but the highest heating water temperature is about 60 ℃; the temperature of the R134a refrigerant for heating can reach 85 ℃ at most, but is not suitable for low-ring temperature (-20 ℃); the highest hot water production temperature of R744(CO2) refrigerant can reach about 90 ℃, and the method can also be suitable for low ring temperature (-20 ℃), but the large-scale commercial application is not yet realized at present due to the high technical requirements and manufacturing cost of a CO2 system.
Disclosure of Invention
In order to solve at least one of the above problems, the present invention provides a heating system, which includes an air source heat pump, a heat storage water tank, a water source heat pump, and a heat supply end, which are connected in sequence;
the air source heat pump and the heat storage water tank form a first circulation loop through an air source heat pump circulating pump;
the heat storage water tank and the water source heat pump form a second circulation loop through a circulation pump at the evaporation side of the water source heat pump;
and the water source heat pump and the heat supply tail end form a third circulation loop through a heat supply tail end circulating pump.
By adopting the technical scheme, the heating system is provided with the air source heat pump, the heat storage water tank, the water source heat pump and the heat supply tail end which are sequentially connected, the air source heat pump suitable for low ring temperature and the water source heat pump suitable for high water temperature are connected through the heat storage water tank, and the air source heat pump, the heat storage water tank and the water source heat pump heat the water temperature to the temperature set by a user;
the air source heat pump and the heat storage water tank form a first circulation loop through an air source heat pump circulating pump; after the first circulation loop operates, the air source heat pump exchanges heat with the air side, and then continuously exchanges heat with the heat storage water tank, so that the real-time water temperature T of the heat storage water tank is increasedHeat storage water tank；
The heat storage water tank and the water source heat pump form a second circulation loop through a circulation pump at the evaporation side of the water source heat pump; after the second circulation loop operates, the heat storage water tank exchanges heat with the water source heat pump, and heat of the heat storage water tank is transferred to the water source heat pump;
the water source heat pump and the heat supply tail end form a third circulation loop through a heat supply tail end circulating pump; after the third circulation loop operates, the water source heat pump provides high real-time water temperature T for the heat supply tail endHeating terminalThe heat output of (2).
The heating system effectively combines the air source heat pump and the water source heat pump, and realizes heat output of high water temperature at the tail end of heat supply under the condition of low environment. Meet the requirement of high water temperature in the market and simultaneously produce the phase-contrast CO2The system technology has low manufacturing cost.
Optionally, the heat storage water tank is provided withA temperature sensor. According to the structure, the temperature sensor is arranged on the heat storage water tank, so that the real-time water temperature T of the heat storage water tank can be mastered in real timeHeat storage water tankAnd the heating system is convenient to control.
Optionally, the refrigerant of the air source heat pump is an R410a refrigerant. By setting the refrigerant of the air source heat pump as the R410a refrigerant, the air source heat pump can be conveniently used at low ambient temperature, such as-20 ℃.
Optionally, the refrigerant of the water source heat pump is an R134a refrigerant. According to the structure, the refrigerant of the water source heat pump is set to be the R134a refrigerant, so that the water source heat pump can be conveniently used under the condition of high water temperature, and if the water temperature can reach 85 ℃ at most.
Optionally, the air source heat pump adopts a variable frequency compressor. Because the water temperature prepared by the air source heat pump 100 is not high, if the air source heat pump 100 is a fixed frequency unit, the problem of temperature shutdown is easy to occur, so that the compressor is frequently started and stopped, and the energy is wasted. This kind of structure adopts inverter compressor with air source heat pump 100, can carry out accurate control to inverter compressor, and then avoids appearing the problem that the compressor frequently stops opening.
The invention also provides a control method of the heating system, which comprises the heating system of any one of the above steps:
after the air source heat pump circulating pump is controlled to be started, the air source heat pump is controlled to operate, and the first circulating loop is operated;
when the real-time water temperature T of the heat storage water tankHeat storage water tankReaches a first preset temperature T1Then, after controlling the circulation pump at the evaporation side of the water source heat pump to start, controlling the water source heat pump to operate and operating the second circulation loop;
and after the heat supply tail end circulating pump is controlled to be started, the heat supply tail end is controlled to operate, and the third circulating loop is operated.
The invention realizes the heat output of high water temperature at the heat supply end under the condition of low environment by controlling each part in the heating system.
Firstly, operating a first circulation loop by controlling an air source heat pump circulation pump and an air source heat pump; at the moment, after the air source heat pump exchanges heat with the air side, the air source heat pump continues to exchange heat with the heat storage water tank, and the real-time water temperature T of the heat storage water tank is increasedHeat storage water tank；
Real-time water temperature T of heat storage water tankHeat storage water tankReaches a first preset temperature T1Then, operating a second circulation loop by controlling a water source heat pump evaporation side circulation pump and a water source heat pump; at the moment, the heat storage water tank exchanges heat with the water source heat pump, and the heat of the heat storage water tank is transferred to the water source heat pump;
finally, a third circulation loop is operated by controlling a heat supply tail end circulating pump and a heat supply tail end; at the moment, the water source heat pump provides high real-time water temperature T for the heat supply tail endHeating terminalThe heat output of (2).
Optionally, when the air source heat pump adopts the inverter compressor, the control method includes the following steps:
when the real-time water temperature T of the heat supply endHeating terminalReaches a second preset temperature T2Then, controlling the inverter compressor according to the running frequency PCompressorOperation of said operating frequency PCompressorCalculated from the following equation:
PCompressor＝(P0+P0×((Theat storage water tank-THeating powder)×μ1))×μ2
Wherein, P0The highest frequency of the operation of the variable frequency compressor is obtained;
Theat storage water tankThe real-time water temperature of the heat storage water tank;
Theating terminalReal-time water temperature for the heating end;
μ1is composed of
Tx is the maximum water temperature of the heat storage water tank, and Ts is the minimum water temperature of the heat storage water tank;
μ21/2;
among the above, (T)Heat storage water tank-THeating powder)×μ1) When > 1, ((T)Heat storage water tank-THeating powder)×μ1) The value of (1);
when ((T)Heat storage water tank-THeating powder)×μ1) When < -1 > ((T)Heat storage water tank-THeating powder)×μ1) The value of (a) is-1;
when-1 < ((T)Heat storage water tank-THeating powder)×μ1) When < 1 > ((T)Heat storage water tank-THeating powder)×μ1) The value of (c) is the actual value.
In this way, when the real-time water temperature at the tail end of the heat supply reaches the second preset temperature T2Then, the real-time water temperature T at the tail end of the heat supply can be effectively maintained by accurately controlling the variable frequency compressor in the air source heat pumpHeating terminal。
Optionally, the highest frequency P0The value range is as follows: p is not less than 60Hz0Less than or equal to 100 Hz. In this way, the highest frequency P is obtained due to low water temperature and small load produced by the air source heat pump0The value range of (A) is set as: p is not less than 60Hz0The requirement of a heating system can be met when the frequency is less than or equal to 100 Hz; p0Preferably 80 Hz.
Optionally, the maximum water temperature Tx has a value range as follows: tx is more than or equal to 25 ℃ and less than or equal to 35 ℃; the minimum water temperature Ts has the following value range: ts is more than or equal to 15 ℃ and less than or equal to 25 ℃. In this way, the value range of the maximum water temperature Tx is set as: tx is more than or equal to 25 ℃ and less than or equal to 35 ℃; the value range of the minimum water temperature Ts is set as follows: ts is more than or equal to 15 ℃ and less than or equal to 25 ℃, and the real-time water temperature T of the heat storage water tank can be increased after heat exchange is carried out between the air source heat pump and the heat storage water tankHeat storage water tankWhen the temperature reaches the range value, the water source heat pump can reach the optimal working condition in the heat exchange process of the heat storage water tank and the water source heat pump. The maximum water temperature Tx is preferably 30 ℃ and the minimum water temperature Ts is preferably 20 ℃.
Optionally, the first preset temperature T1The value range is as follows: t is not less than 20 DEG C1Less than or equal to 30 ℃. In this way, the first preset temperature T is adjusted1The value range of (A) is set as: t is not less than 20 DEG C1≤30DEG C if the first predetermined temperature T1If the value range is too low, the heat exchange between the subsequent water source heat pump and the heat storage water tank is not facilitated, and if the first preset temperature T is higher than the second preset temperature T1If the value range of (a) is too high, the heat exchange between the air source heat pump and the heat storage water tank is not facilitated. Wherein the first preset temperature T1Preferably 25 deg.c.
Drawings
Fig. 1 is a schematic structural view of a heating system according to embodiment 1 of the present invention;
fig. 2 is a flowchart of a control method of a heating system according to embodiment 2 of the present invention.
Description of reference numerals:
100-air source heat pump; 200-a heat storage water tank; 300-water source heat pump; 400-heating end; 500-air source heat pump circulation pump; 600-water source heat pump evaporation side circulating pump; 700-heat supply end circulation pump; 800-temperature sensor.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Example 1
As shown in fig. 1, a heating system includes an air source heat pump 100, a hot water storage tank 200, a water source heat pump 300, and a heating terminal 400, which are connected in sequence;
the air source heat pump 100 and the heat storage water tank 200 form a first circulation loop through an air source heat pump circulation pump 500;
the heat storage water tank 200 and the water source heat pump 300 form a second circulation loop through a water source heat pump evaporation side circulation pump 600;
the water source heat pump 300 and the heating tip 400 form a third circulation loop by the heating tip circulation pump 700.
The heating system is provided with an air source heat pump 100, a heat storage water tank 200, a water source heat pump 300 and a heat supply tail end 400 which are sequentially connected, wherein the air source heat pump 100 suitable for low ring temperature and the water source heat pump 300 suitable for high water temperature are connected through the heat storage water tank 200, and the air source heat pump 100, the heat storage water tank 200 and the water source heat pump 300 heat the water temperature to the temperature set by a user;
wherein, the air source heat pump 100 and the heat storage water tank 200 form a first circulation loop through an air source heat pump circulation pump 500; after the first circulation loop operates, the air source heat pump 100 exchanges heat with the air side, and then continuously exchanges heat with the heat storage water tank 200, so that the real-time water temperature T of the heat storage water tank 200 is increasedHeat storage water tank；
The heat storage water tank 200 and the water source heat pump 300 form a second circulation loop through a water source heat pump evaporation side circulation pump 600; after the second circulation loop operates, the heat storage water tank 200 exchanges heat with the water source heat pump 300, and the heat of the heat storage water tank 200 is transferred to the water source heat pump 300;
the water source heat pump 300 and the heating end 400 form a third circulation loop through a heating end circulation pump 700; after the third circulation loop is operated, the waterhead heat pump 300 provides a high real-time water temperature T to the heating end 400Heating terminalThe heat output of (2).
The heating system of the invention effectively combines the air source heat pump 100 and the water source heat pump 300, and realizes the heat output of the heat supply end 400 with high water temperature under the condition of low environment. Meet the requirement of high water temperature in the market and simultaneously produce the phase-contrast CO2The system technology has low manufacturing cost.
Wherein the heat supply terminal 400 includes a water tank or a radiator, etc.
In the present embodiment, the hot water storage tank 200 is provided with a temperature sensor 800. With this configuration, by providing the temperature sensor 800 on the hot water storage tank 200, the real-time water temperature T of the hot water storage tank 200 can be grasped in real timeHeat storage water tankAnd the heating system is convenient to control.
In the present embodiment, the refrigerant of the air-source heat pump 100 is the R410a refrigerant. With the structure, the refrigerant of the air source heat pump 100 is set to be the R410a refrigerant, so that the air source heat pump 100 can be conveniently used under the condition of low ambient temperature, such as the low ambient temperature of minus 20 ℃.
In the present embodiment, the refrigerant of the water source heat pump 300 is R134a refrigerant. With the structure, the refrigerant of the water source heat pump 300 is set to be the R134a refrigerant, so that the water source heat pump 300 can be conveniently used under the condition of high water temperature, and the water temperature can reach 85 ℃ at most.
In the present embodiment, the air-source heat pump 100 employs an inverter compressor. Because the water temperature prepared by the air source heat pump 100 is not high, if the air source heat pump 100 is a fixed frequency unit, the problem of temperature shutdown is easy to occur, so that the compressor is frequently started and stopped, and the energy is wasted. This kind of structure adopts inverter compressor with air source heat pump 100, can carry out accurate control to inverter compressor, and then avoids appearing the problem that the compressor frequently stops opening.
Example 2
The present invention provides a control method embodiment of a heating system, it should be noted that the steps shown in the flowchart of the figure may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different than here.
As shown in fig. 2, the control method includes the heating system of embodiment 1, and specifically, the control method includes the steps of:
s1, controlling the air source heat pump to run after the air source heat pump circulating pump is started, and running the first circulating loop;
s2, when the real-time water temperature T of the heat storage water tankHeat storage water tankReaches a first preset temperature T1Then, after the circulating pump at the evaporation side of the water source heat pump is controlled to be started, the water source heat pump is controlled to operate, and the second circulating loop is operated;
and S3, controlling the heat supply tail end to operate and operating the third circulation loop after controlling the heat supply tail end circulation pump to start.
The invention realizes the heat output of high water temperature at the heat supply end under the condition of low environment by controlling each part in the heating system.
Firstly, operating a first circulation loop by controlling an air source heat pump circulation pump and an air source heat pump; at the moment, after the air source heat pump exchanges heat with the air side, the air source heat pump continues to exchange heat with the heat storage water tank, and the real-time water temperature T of the heat storage water tank is increasedHeat storage water tank；
Real-time water temperature T of heat storage water tankHeat storage water tankReaches a first preset temperature T1Then, operating a second circulation loop by controlling a water source heat pump evaporation side circulation pump and a water source heat pump; at the moment, the heat storage water tank exchanges heat with the water source heat pump, and the heat of the heat storage water tank is transferred to the water source heat pump;
finally, a third circulation loop is operated by controlling a heat supply tail end circulating pump and a heat supply tail end; at the moment, the water source heat pump provides high real-time water temperature T for the heat supply tail endHeating terminalThe heat output of (2).
In this embodiment, when the air source heat pump adopts an inverter compressor, the control method includes the following steps:
real-time water temperature T when heat supply is finishedHeating terminalReaches a second preset temperature T2Then, the inverter compressor is controlled according to the running frequency PCompressorOperation, operating frequency PCompressorCalculated from the following equation:
PCompressor＝(P0+P0×((Theat storage water tank-THeating powder)×μ1))×μ2
Wherein, P0For frequency conversionThe highest frequency at which the compressor operates;
Theat storage water tankThe real-time water temperature of the heat storage water tank;
Theating terminalReal-time water temperature for the heating end;
μ1is composed of
Tx is the maximum water temperature of the heat storage water tank, and Ts is the minimum water temperature of the heat storage water tank;
μ21/2;
among the above, (T)Heat storage water tank-THeating powder)×μ1) When > 1, ((T)Heat storage water tank-THeating powder)×μ1) The value of (1);
when ((T)Heat storage water tank-THeating powder)×μ1) When < -1 > ((T)Heat storage water tank-THeating powder)×μ1) The value of (a) is-1;
when-1 < ((T)Heat storage water tank-THeating powder)×μ1) When < 1 > ((T)Heat storage water tank-THeating powder)×μ1) The value of (c) is the actual value.
In this way, when the real-time water temperature at the tail end of the heat supply reaches the second preset temperature T2Then, the real-time water temperature T at the tail end of the heat supply can be effectively maintained by accurately controlling the variable frequency compressor in the air source heat pumpHeating terminal. Operating frequency PCompressorThe calculation comprehensively considers the parameters of the heat storage water tank and the heat supply tail end, and the purpose of controlling the heating system can be achieved by accurately controlling the variable frequency compressor.
Wherein the second preset temperature T2The temperature is set for the user.
In the present embodiment, the highest frequency P0The value range is as follows: p is not less than 60Hz0Less than or equal to 100 Hz. In this way, the highest frequency P is obtained due to low water temperature and small load produced by the air source heat pump0The value range of (A) is set as: p is not less than 60Hz0The requirement of a heating system can be met when the frequency is less than or equal to 100 Hz; p0Preferably 80 Hz.
In the present embodiment, the maximum water temperature Tx has a value range of: tx is more than or equal to 25 ℃ and less than or equal to 35 ℃; the minimum water temperature Ts has the value range as follows: ts is more than or equal to 15 ℃ and less than or equal to 25 ℃.
In this way, the value range of the maximum water temperature Tx is set as: tx is more than or equal to 25 ℃ and less than or equal to 35 ℃; the value range of the minimum water temperature Ts is set as follows: ts is more than or equal to 15 ℃ and less than or equal to 25 ℃, and the real-time water temperature T of the heat storage water tank can be increased after heat exchange is carried out between the air source heat pump and the heat storage water tankHeat storage water tankWhen the temperature reaches the range value, the water source heat pump can reach the optimal working condition in the heat exchange process of the heat storage water tank and the water source heat pump. The maximum water temperature Tx is preferably 30 ℃ and the minimum water temperature Ts is preferably 20 ℃.
In the present embodiment, the first preset temperature T1The value range is as follows: t is not less than 20 DEG C1Less than or equal to 30 ℃. In this way, the first preset temperature T is adjusted1The value range of (A) is set as: t is not less than 20 DEG C1Less than or equal to 30 ℃ if the first preset temperature T is higher than or equal to1If the value range is too low, the heat exchange between the subsequent water source heat pump and the heat storage water tank is not facilitated, and if the first preset temperature T is higher than the second preset temperature T1If the value range of (a) is too high, the heat exchange between the air source heat pump and the heat storage water tank is not facilitated. Wherein the first preset temperature T1Preferably 25 deg.c.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A control method of a heating system, characterized by: the control method is applied to a heating system, and the heating system comprises an air source heat pump (100), a heat storage water tank (200), a water source heat pump (300) and a heat supply tail end (400) which are sequentially connected;
the air source heat pump (100) and the heat storage water tank (200) form a first circulation loop through an air source heat pump circulation pump (500);
the heat storage water tank (200) and the water source heat pump (300) form a second circulation loop through a water source heat pump evaporation side circulation pump (600);
the water source heat pump (300) and the heat supply tail end (400) form a third circulation loop through a heat supply tail end circulating pump (700);
the control method comprises the following steps:
after the air source heat pump circulating pump is controlled to be started, the air source heat pump is controlled to operate, and the first circulating loop is operated;
when the real-time water temperature T of the heat storage water tankHeat storage water tankReaches a first preset temperature T1Then, after controlling the circulation pump at the evaporation side of the water source heat pump to start, controlling the water source heat pump to operate and operating the second circulation loop;
after the heat supply tail end circulating pump is controlled to be started, the heat supply tail end is controlled to operate, and the third circulating loop is operated;
when the real-time water temperature T of the heat supply endHeating terminalReaches a second preset temperature T2Then, controlling the inverter compressor of the air source heat pump according to the running frequency PCompressorOperation of said operating frequency PCompressorCalculated from the following equation:
PCompressor＝(P0+P0×((Theat storage water tank-THeating powder)×μ1))×μ2
Wherein, P0The highest frequency of the operation of the variable frequency compressor is obtained;
Theat storage water tankThe real-time water temperature of the heat storage water tank;
Theating terminalReal-time water temperature for the heating end;
μ1is composed of
Tx is the maximum water temperature of the heat storage water tank, and Ts is the minimum water temperature of the heat storage water tank;
μ21/2;
among the above, (T)Heat storage water tank-THeating powder)×μ1)>1 time ((T)Heat storage water tank-THeating ofHeat powder)×μ1) The value of (1);
when ((T)Heat storage water tank-THeating powder)×μ1)<When is-1, ((T)Heat storage water tank-THeating powder)×μ1) The value of (a) is-1;
when-1<((THeat storage water tank-THeating powder)×μ1)<1 time ((T)Heat storage water tank-THeating powder)×μ1) The value of (c) is the actual value.
2. The control method according to claim 1, characterized in that: the highest frequency P0The value range is as follows: p is not less than 60Hz0≤100Hz。
3. The control method according to claim 1, characterized in that: the value range of the maximum water temperature Tx is as follows: tx is more than or equal to 25 ℃ and less than or equal to 35 ℃; the minimum water temperature Ts has the following value range: ts is more than or equal to 15 ℃ and less than or equal to 25 ℃.
4. The control method according to claim 1, characterized in that: the first preset temperature T1The value range is as follows: t1 is more than or equal to 20 ℃ and less than or equal to 30 ℃.
Priority Applications (1)
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